Ili ti Tomicin izveshtaj o Dead pixel-ima:
Hitachi makes a distinction between two matters. Their LCD monitors are guaranteed zer-dead pixels. Let's be quite clear about this - Hitachi means PIXELS and not SUB-pixels. They will replace your monitor, no questions asked, even if it only has one black or white dot, but not if the pixel is red, green or blue. At least this is what Hitachi US told us, but they pointed out this policy may not aply to Hitachi Europe, who did not reply to us.
Officially, Hyundai claims to replace panels after the third dead pixel. But they actually do so after two, on both 15" and 17" monitors, and whether they are unlit, lit or colored. Well done, Hyundai!
At LG, after a month and a half, we established that there are two attitudes.
In Europe, they were still waiting for Korea to answer. OK, but what if you are an end customer, are you realistically going to make a call to Korea? Obviously not. So we pretended to be a customer again and discovered a new rule, which is now a circle of 10cm in diameter. In the States, the attitude is different but no plainer. Far from it. There they talk about 25mm differences, colors, locations, etc. LG would be well-advised to simplify its procedures.
Hercules and Iiyama use figures which, unlike the ISO standard, apply equally to lit, colored or unlit pixels. We especially appreciate this in Iiyama; their policy is definitely better than the ISO standard.
While on the subject of Hercules, it is interesting to note that they have recently changed their replacement policy. The new one, in the table above, is already up and running, and takes the place of the previous one which required at least six dead pixels.
Lite On is the only manufacturer to claim that they will take back a panel with a single, solitary, defective pixel. It remains to be seen whether the superstores will follow suit. Sadly, it seems that this is not always the case: some of them apply a rule that requires three.
NEC has taken an original stance, which, fortunately, is to the advantage of users. The official line is that the manufacturer complies with the ISO 113406-2 standard. But they are aware of the standard's limits, and have thus decided to stretch it a bit and apply the same rule to 15" and 17" alike. And that's a good thing, too!
Neovo, CTX and Relisys all refused to reply. See comments on CTX and Relisys.
Packard Bell had yet another rule, which is vertically aligned pixels.
Then there is the Philips "zero-lit-pixel defect" guarantee, which covers the lack of lit or colored pixels, but not unlit ones. Still, unlit ones are not nearly so bothersome. So, praise to Philips for this initiative, even if they really should extend it to their entire range.
QDI sticks pretty much to the standard. The difference might just be due to a slip in their answer.
After getting an initial rejection from Relisys, we finally met with them at the CeBIT. Since then, Relisys has completely cleaned up its line of products. Gone are the days when 12 pixel errors were required before they took action. Now, all it takes are four or five faulty pixels (depending on the model) with the 15-inch models and seven pixels with the 17-inch model. However, this is still above the average and pushes the tolerance level.
Sony is one of the few exceptions: they follow the ISO standard, they understand it and they apply it.
Solarism has a straightforward policy: whether 15 or 17 inches, they change it after three dead pixels.
Samsung could try harder. Six dead pixels allowed on a 15", or nine on a 17", are too many!
ViewSonic assured us they have applied the ISO 13406-2 standard to the letter since it came into force. This is something of an exception.
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